Chip breaker



March 10, 1931. EA BLOOD ET Al.

CHIP BREAKER Filed April 25, 1930 Patented Mar. 10, 1931 nari l mais rei-aar ermee LAURENCEnfnnoonor NEWTON, AND BERCY H. YOUNG, on QUINCY, MASSACHU- x snTTs, rissIeNons Tos. A. woons MACHINE COMPANY, or BosToN, MASSACHU- snTTs, A CoRroRATroN or MASSACHUSETTS i CHIP BREAKER Application filed April 25,

- work easily and not gather dirt in use.

Our invention will be well understood by reference to the following description of an illustrative embodiment thereof shown by way of example in the accompanying drawings, wherein: Y Y

Fig. lis a conventional longitudinal section through a part of a wood planing machine showing a section through the chip breaker bar; f

Fig. 2 is a partial rear elevation, only some of the shoes being shown; and l Fig. '3 is a section on the line 3-3 of Fig. 1. Referring to the drawings, we have there shown' a board w being advanced over the bed 5 of the machine by the feed rolls 7 for operation thereon of the upper cutter head 9 which turns counterclockwise as indicated by the arrow. Immediately to the rear of the cutter head 9 is located the chip breaker which herein comprises a bar 11 extending across the Ymachine, at the forward face of. which are slidably mounted for up and down movement the individual shoes 13. Our invention more particularly relatesy to the construction of Y these shoes andthe bar wherebythe former are carried by thevlatter, are free working, Vare strong and are unlikely to be jammed by dust and dirt entering therein.

Herein (see Fig. 2) the bar 13'is formed along its lower'edge with the open-ended f slots 15 opening towards the bottom thereof and defining betweenfthem the substantial toothlike projections 17. The lower portions of the shoes 13 are here shown as provided with suitable rearwardly projecting ribs 19 adapted to be received in and work in the slots, being retained by the enlarged heads 21jwhich overlap the sides of the slots proy vided by the teeth 417', as clearly shown in Figs.

2 and 3.k These parts are Ypreferably one integral piece, the, shoes 13 adjacent their lower 1930. Serial No. 447,213.

portions presenting an I section, as shown in Fig. 3, the web of the I working in a slot between portions 17. Preferably the shoes and the enlarged heads 21 iit together laterally and a slight clearance may be provided be tween the webs and the portions 17 as indi ecated by the shade lines in Fig. 3.

The upper ends of the shoes may be engaged withY the bar ll by means of the L- shaped gibs 23` bolted thereto and embracing the upper edge of the bar. Through these parts project the stems 25 secured to the upper edge of the bar and which carry the springs 27 against whichr the shoes work in the customary manner.

By the arrangement shown the shoes can be located and supported very close to the work, and as the work coming in contact therewith from the right, viewing Fig. 1, acts through a short lever arm exercising relatively little cant/ing action, the shoes may move readily and in a vertical direction. There are no thin necks of metal likely to break, but on the contrary the section of the shoes at the bottom is of the most sturdy sort (see Fig. 3). Since the shoes work in open-ended slots, orconversely since the parts 15 work in guideways in the shoes which extend uninterrupted therethrough to the bottom faces thereof, dirt and dust which may work in can drop out freely under gravity. 7e also prefer to slope the upper surface of the rib 19, as shown at-29, downwardly and rearwardly so that dirt will naturally fall therefrom instead of to the main body of the bar by the rearwardly andv downwardly sloping surface 33 from which thedirt naturally works off in the reciprocatingmovement ofthe shoes. 'f

.It will. be seen that inthe arrangemen shown except. for the upper surface of the without @Xue tion as tine/fen-vl j to gagernent of the shoes at their lower ends, which ,are most exposedV to the accumulation of dirt in the operation of the machine, the opposing Isurfaces all'eXtendj in such manner as to open freely to the exterior of the assembly and there are no horizontal surfaces or upwardly facing dihedral angles in which dirt might he poeketed and collect ultimately' to interfere with breaker. l j

We are aware that the invention may be embodied in other specific forms Without departing from the. spirit oru essential attributes thereof, and .we therefore `desire the present embodiment toV be consideredV in all respects the operation of the ychip as illustrative and not restrictive; reference' being had tothe appended claims rather than l to the foregoing description toY indicate the scope of the invention. 1 i

Claims: y j lfn achip breakera barl having down-v wardly'facing open-ended lslots and shoes `having projections 'on the rearward"facesk worling'in the slots land means cooperating f .with saidj projections' to retain them-'inthe slots.`

wardlyv facing open-'ended slots, shoes lon the face of ythe ,barhaving atthe upper ends' --gibs embracingzthe upper edge thereof, ribs adjacent' their? lowerl endsY working in lthe slots"` and 'enlargedvx heads ony .the ribs overlyt'hef'si'des oftheslots.

'3;' a `ch,ip"breaker aba'r having/down- 'f-wardly facing open-ended slots' and'shoes having adj acent' their i lower ends'` portions ofi'nt'egra'l'I section, the web of the I working=in`aslot- 4S vIn a'chip ybreakera barv having downwardlyy extending projections, slices slidahle on'th'e barhaving ribs working vin the spaces between said projections, the' vupper faces of" said'ribs being sloped to discharge dirt therei from; andA means cooperating with theY ribs to hold "tl'iein` engagedjin said spaces,

5; In achip breaker a bar having downwa'rdly extending projections,shoes slidable onthe barhaving ribsw'orliing in the spaces between-fsaid projections, the upper faces'`V of'fsaidribs being'` sloped to discharge dirt therefrom, the r'ip'posedwalls.l of said spaces being' likewise inclined, Y and means cooperate,

ingfwith the" ribs ,to hold'tliem engagedlin said`spac'es. i f

6'.` ln 'a4 chip breaker` abarjhavingalongits lower -edgea series vof spaced projections and. chip breaker shoes recip'rocable thereonfcut away'to provide g'uideway's to 'receive thepro? f jec'tions,fs'aid guideways 'being open atfbbtlif,

Y 7 In a chip breakerl a bar having a reduced upper edge portion c'onneetedV withVK the body.

i of' ba'rb'y 'al downwardly andrear'wardly.

.s Y. G 2. ln a chi breaker a bar havin@v downends and having at their upper end gibs embracing said upper edge portion.

8. In a chip-breaker, in combination, a bar and slices slidable up and down thereon having means interengaging them with 'the' 

